尽管已正确初始化，XIB 视图仍未显示任何内容

Question

我正在尝试使用 .xib 文件在 TableViewCell 中制作可重用视图。我将所有需要的数据提供给 TableViewCell，它有一个 UIView，它是我的可重用 .xib。我在 UIView 中正确打印了 init 函数，但模拟器屏幕上没有显示任何内容。找不到原因，卡了好久。

这是我的 xib 文件：

哪个与我的 UIView 正确关联：

import Kingfisher

class DebateBoxView: UIView {
    @IBOutlet var debateBoxView: UIView!
    @IBOutlet weak var debateBoxImage: UIImageView!
    @IBOutlet weak var debateBoxTitle: UILabel!
    
    var debate: Debate! {
        didSet {
            debateBoxImage.kf.setImage(with: URL(string: debate.imageURL))
            debateBoxTitle.text = debate.name
        }
    }
    
    override init(frame: CGRect){
        super.init(frame: frame)
        self.commonInit()
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        self.commonInit()
    }
    
    func commonInit(){
        let bundle = Bundle(for: LogoraApp.self) // I'm not using "Bundle.main" because it is a framework.
        bundle.loadNibNamed("DebateBoxView", owner: self, options: nil)
        debateBoxView.translatesAutoresizingMaskIntoConstraints = false
        self.addSubview(debateBoxView)
        debateBoxView.leftAnchor.constraint(equalTo: self.leftAnchor).isActive = true
        debateBoxView.rightAnchor.constraint(equalTo: self.rightAnchor).isActive = true
        debateBoxView.topAnchor.constraint(equalTo: self.topAnchor).isActive = true
        debateBoxView.bottomAnchor.constraint(equalTo: self.bottomAnchor).isActive = true
    }
}

在我的 tableViewCell 中：

import UIKit

class DebateBox: UITableViewCell {
    @IBOutlet weak var debateBoxView: DebateBoxView!
}

然后在 tableView 本身中：

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = searchResultsTableView.dequeueReusableCell(withIdentifier: "searchDebateBox", for: indexPath) as! DebateBox
        cell.debateBoxView.debate = debateSearchResults[indexPath.row]
        return cell
    }

Answer 1

我遇到了类似的问题...尝试在 viewDidLoad 中注册单元格。

searchResultsTableView.register(UINib(nibName: "DebateBox", bundle: nil), forCellReuseIdentifier: "searchDebateBox")

Answer 2

我终于找到了解决办法。问题是我对 xib 文件的约束不够详细，所以它没有显示在 UI 中。如果有人经过，这是我初始化笔尖的代码：

override init(frame: CGRect){
        super.init(frame: frame)
        self.commonInit()
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        self.commonInit()
    }
    
    func commonInit(){
        let bundle = Bundle(for: Self.self)
        let nib = UINib(nibName: String(describing: type(of: self)), bundle: bundle)
        nib.instantiate(withOwner: self, options: nil)

        addSubview(contentView)
        contentView.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            contentView.topAnchor.constraint(equalTo: topAnchor),
            contentView.bottomAnchor.constraint(equalTo: bottomAnchor),
            contentView.leadingAnchor.constraint(equalTo: leadingAnchor),
            contentView.trailingAnchor.constraint(equalTo: trailingAnchor)
        ])
    }

尽管已正确初始化，XIB 视图仍未显示任何内容

XIB view doesn't show anything despite being correctly initialized

storyboard

xib

ios

swift